static void findKeySigEvents (MidiFile& midiFile, StringPairArray& midiMetadata)
{
MidiMessageSequence keySigEvents;
midiFile.findAllKeySigEvents (keySigEvents);
const int numKeySigEvents = keySigEvents.getNumEvents();
MemoryOutputStream keySigSequence;
for (int i = 0; i < numKeySigEvents; ++i)
{
const MidiMessage& message (keySigEvents.getEventPointer (i)->message);
const int key = jlimit (0, 14, message.getKeySignatureNumberOfSharpsOrFlats() + 7);
const bool isMajor = message.isKeySignatureMajorKey();
static const char* majorKeys[] = { "Cb", "Gb", "Db", "Ab", "Eb", "Bb", "F", "C", "G", "D", "A", "E", "B", "F#", "C#" };
static const char* minorKeys[] = { "Ab", "Eb", "Bb", "F", "C", "G", "D", "A", "E", "B", "F#", "C#", "G#", "D#", "A#" };
String keySigString (isMajor ? majorKeys[key]
: minorKeys[key]);
if (! isMajor)
keySigString << 'm';
if (i == 0)
midiMetadata.set (CoreAudioFormat::keySig, keySigString);
if (numKeySigEvents > 1)
keySigSequence << keySigString << ',' << keySigEvents.getEventTime (i) << ';';
}
if (keySigSequence.getDataSize() > 0)
midiMetadata.set ("key signature sequence", keySigSequence.toUTF8());
}
static void findTimeSigEvents (MidiFile& midiFile, StringPairArray& midiMetadata)
{
MidiMessageSequence timeSigEvents;
midiFile.findAllTimeSigEvents (timeSigEvents);
const int numTimeSigEvents = timeSigEvents.getNumEvents();
MemoryOutputStream timeSigSequence;
for (int i = 0; i < numTimeSigEvents; ++i)
{
int numerator, denominator;
timeSigEvents.getEventPointer(i)->message.getTimeSignatureInfo (numerator, denominator);
String timeSigString;
timeSigString << numerator << '/' << denominator;
if (i == 0)
midiMetadata.set (CoreAudioFormat::timeSig, timeSigString);
if (numTimeSigEvents > 1)
timeSigSequence << timeSigString << ',' << timeSigEvents.getEventTime (i) << ';';
}
if (timeSigSequence.getDataSize() > 0)
midiMetadata.set ("time signature sequence", timeSigSequence.toUTF8());
}
static void findTempoEvents (MidiFile& midiFile, StringPairArray& midiMetadata)
{
MidiMessageSequence tempoEvents;
midiFile.findAllTempoEvents (tempoEvents);
const int numTempoEvents = tempoEvents.getNumEvents();
MemoryOutputStream tempoSequence;
for (int i = 0; i < numTempoEvents; ++i)
{
const double tempo = getTempoFromTempoMetaEvent (tempoEvents.getEventPointer (i));
if (tempo > 0.0)
{
if (i == 0)
midiMetadata.set (CoreAudioFormat::tempo, String (tempo));
if (numTempoEvents > 1)
tempoSequence << String (tempo) << ',' << tempoEvents.getEventTime (i) << ';';
}
}
if (tempoSequence.getDataSize() > 0)
midiMetadata.set ("tempo sequence", tempoSequence.toUTF8());
}
void MidiMessageSequence::extractSysExMessages (MidiMessageSequence& destSequence) const
{
for (int i = 0; i < list.size(); ++i)
{
const MidiMessage& mm = list.getUnchecked(i)->message;
if (mm.isSysEx())
destSequence.addEvent (mm);
}
}
//==============================================================================
void MidiMessageSequence::extractMidiChannelMessages (const int channelNumberToExtract,
MidiMessageSequence& destSequence,
const bool alsoIncludeMetaEvents) const
{
for (int i = 0; i < list.size(); ++i)
{
const MidiMessage& mm = list.getUnchecked(i)->message;
if (mm.isForChannel (channelNumberToExtract) || (alsoIncludeMetaEvents && mm.isMetaEvent()))
destSequence.addEvent (mm);
}
}
//==============================================================================
void MidiSequencePlugin::processBlock (AudioSampleBuffer& buffer, MidiBuffer& midiMessages)
{
MidiSequencePluginBase::processBlock(buffer, midiMessages);
MidiMessageSequence sourceMidi = *midiSequence;
std::vector<int> doneTheseControllers;
if (transport->isPlaying () && getBoolValue(PROP_SEQENABLED, true))
{
const int blockSize = buffer.getNumSamples ();
MidiBuffer* midiBuffer = midiBuffers.getUnchecked (0);
const int frameCounter = transport->getPositionInFrames ();
const int framesPerBeat = transport->getFramesPerBeat ();
const int nextBlockFrameNumber = frameCounter + blockSize;
const int seqIndex = getLoopRepeatIndex();
const double beatCount = getLoopBeatPosition();
const double frameLenBeatCount = (nextBlockFrameNumber - frameCounter) / (double)framesPerBeat;
double frameEndBeatCount = beatCount + frameLenBeatCount;
if (frameEndBeatCount > getLengthInBeats())
frameEndBeatCount -= getLengthInBeats();
// loop for each controller we need to interpolate
MidiMessage* lastCtrlEvent = NULL;
do
{
lastCtrlEvent = NULL;
// hunt for a controller event before now
int i;
for (i = 0; i < sourceMidi.getNumEvents (); i++)
{
int timeStampInSeq = roundFloatToInt (sourceMidi.getEventTime (i) * framesPerBeat);
int timeStamp = timeStampInSeq + (seqIndex * getLengthInBeats() * framesPerBeat);
MidiMessage* midiMessage = &sourceMidi.getEventPointer (i)->message;
if (timeStamp >= nextBlockFrameNumber || !midiMessage)
break; // event is after now, leave
//if (midiMessage->isController() && (std::find(doneTheseControllers.begin(), doneTheseControllers.end(), midiMessage->getControllerNumber()) == doneTheseControllers.end()))
// lastCtrlEvent = midiMessage;
}
// hunt for a matching event after that one
if (lastCtrlEvent)
{
// store the controller number so we know which controllers we've done
doneTheseControllers.push_back(lastCtrlEvent->getControllerNumber());
MidiMessage* nextCtrlEvent = NULL;
for (; i < sourceMidi.getNumEvents (); i++)
{
MidiMessage* midiMessage = &sourceMidi.getEventPointer (i)->message;
if (midiMessage->isController() && midiMessage->getControllerNumber() == lastCtrlEvent->getControllerNumber())
{
nextCtrlEvent = midiMessage;
break;
}
}
// render an interpolated event!...
if (nextCtrlEvent)
{
double bt = nextCtrlEvent->getTimeStamp();
double at = lastCtrlEvent->getTimeStamp();
double deltaBeats = bt - at;
int a = lastCtrlEvent->getControllerValue();
int b = nextCtrlEvent->getControllerValue();
double now = beatCount + (frameEndBeatCount - beatCount) / 2.0;
double interpRemainBeats = deltaBeats - (now - at);
if (deltaBeats > 0)
{
double nextPart = interpRemainBeats / deltaBeats;
nextPart = 1 - nextPart;
double interpdVal = a + nextPart * (b - a);
MidiMessage interpy = MidiMessage::controllerEvent(lastCtrlEvent->getChannel(), lastCtrlEvent->getControllerNumber(), static_cast<int>(interpdVal));
midiBuffer->addEvent (interpy, (nextBlockFrameNumber - frameCounter) / 2);
}
else
{
DBG ("Negative delta beats when rendering automation!!");
}
}
}
// now we also need to do that again if there are multiple events per frame AND we are interpolating multiple times per frame
// (at the moment only interpolating once per audio frame)
} while (lastCtrlEvent != NULL);
}
}
MidiReader::TrackReaderImpl::TrackReaderImpl(MidiMessageSequence const & sequence)
: sequence_(sequence)
, count_(sequence.getNumEvents())
, current_(0)
{}
MidiMessageSequence* MidiStochaster::createMelody(int minOctaveOffset, int maxOctaveOffset, double speedFactor) {
int currentOctaveOffset;
if (minOctaveOffset <= 0) {
currentOctaveOffset = 0;
} else {
currentOctaveOffset = minOctaveOffset;
}
int randInt1 = randomInt(100, 200);
double stopProbability = (double) randInt1 / (randInt1 + 1);
int randInt2 = randomInt(4, 10);
double octaveSwitchProbability = (double) randInt2 / (randInt2 + 1);
double currentTime = 0.0;
MidiMessageSequence* melody = new MidiMessageSequence(starter);
if (!goodSource) {
return melody;
}
while (randomDouble(0,1) < stopProbability) {
int notePitch = pitches->at(randomInt(0, pitches->size() - 1)) + 12 * currentOctaveOffset;
while (notePitch < 0) {
notePitch+=12;
currentOctaveOffset++;
minOctaveOffset++;
}
while (notePitch > 127) {
notePitch-=12;
currentOctaveOffset--;
maxOctaveOffset--;
}
int noteVelocity = randomInt(lowVelocity, highVelocity);
int noteLength = randomDouble(lowNoteLength, highNoteLength) * (1.0 / speedFactor);
int nextRestLength;
if (randomDouble(0,1) < negRestProbability) {
nextRestLength = randomDouble(lowNegRestLength, highNegRestLength) * 1.0 / speedFactor;
} else {
nextRestLength = randomDouble(lowRestLength, highRestLength) * 1.0 / speedFactor;
}
MidiMessage noteDown = MidiMessage::noteOn(1, notePitch, (uint8_t) noteVelocity);
noteDown.setTimeStamp(currentTime);
MidiMessage noteUp = MidiMessage::noteOff(1, notePitch);
noteUp.setTimeStamp(currentTime + noteLength);
melody->addEvent(noteDown);
melody->addEvent(noteUp);
melody->updateMatchedPairs();
currentTime += noteLength + nextRestLength;
if (randomDouble(0,1) > octaveSwitchProbability) {
currentOctaveOffset = randomInt(minOctaveOffset, maxOctaveOffset);
}
}
return melody;
}
void MidiThread::run() {
midiPort = MidiOutput::openDevice(0);
map<double, double>::iterator tempoIterator = tempos.begin();
double tickLength = tempoIterator->second;
double initTempo = 60000 / (tickLength * ppq);
tempoIterator++;
map<double, std::pair<int, int>>::iterator timeSigIterator = timeSigs.begin();
int timeSigNumerator = timeSigIterator->second.first;
int timeSigDenominator = timeSigIterator->second.second;
timeSigIterator++;
MidiMessage message;
// MIDI click intro
File clickFile("Click120.mid");
ScopedPointer<FileInputStream> clickStream = clickFile.createInputStream();
double eventTick;
double prevTick = 0;
double prevDelta = 0;
int now = Time::getMillisecondCounter();
if (clickStream) {
click.readFrom(*clickStream);
short clickPpq = click.getTimeFormat();
MidiMessageSequence clickSequence = MidiMessageSequence();
clickSequence = *click.getTrack(0);
int i = 0;
while (i < clickSequence.getNumEvents()) {
message = clickSequence.getEventPointer(i)->message;
eventTick = message.getTimeStamp();
double origBpm = 60000 / (tickLength * clickPpq);
double delta = prevDelta + ((eventTick - prevTick) * (origBpm / initTempo)) * tickLength;
Time::waitForMillisecondCounter(now + delta);
midiPort->sendMessageNow(message);
i++;
prevTick = eventTick;
prevDelta = delta;
}
}
now = Time::getMillisecondCounter();
prevTick = 0;
prevDelta = 0;
int currentBar = 1;
int currentBeat = 1;
int currentTick = 0;
int quartersPerBar = timeSigNumerator * (timeSigDenominator / 4);
int tickStartOfBar = 0;
int tickStartNextBar = quartersPerBar * ppq;
currentBpm = initTempo;
int i = 0;
while (i < midiSequence.getNumEvents() && !threadShouldExit()) {
std::stringstream ss;
ss << currentBpm;
content->updateBpm(ss.str());
message = midiSequence.getEventPointer(i)->message;
eventTick = message.getTimeStamp(); // number of midi ticks until note
if (tempoIterator != tempos.end() && eventTick >= tempoIterator->first) {
tickLength = tempoIterator->second;
tempoIterator++;
}
if (timeSigIterator != timeSigs.end() && eventTick >= timeSigIterator->first) {
timeSigNumerator = timeSigIterator->second.first;
timeSigDenominator = timeSigIterator->second.second;
quartersPerBar = timeSigNumerator * (4 / timeSigDenominator);
timeSigIterator++;
}
if (eventTick >= tickStartNextBar) {
tickStartOfBar = tickStartNextBar;
tickStartNextBar = tickStartOfBar + quartersPerBar * ppq;
currentBar = currentBar + static_cast<int> (std::floor((eventTick - tickStartOfBar) / (ppq * quartersPerBar))) + 1;
}
currentBeat = static_cast<int> (std::floor((eventTick - tickStartOfBar)/ ppq)) % timeSigNumerator + 1;
currentTick = static_cast<int> (eventTick) % ppq;
if (!message.isMetaEvent() && (currentTick == 0 || currentTick == 120 || currentTick == 240 || currentTick == 360)) {
std::stringstream ss;
ss << currentBar << ":" << currentBeat << ":" << setfill('0') << setw(3) << currentTick;
content->updateBbt(ss.str());
}
double origBpm = 60000 / (tickLength * ppq);
double delta = prevDelta + ((eventTick - prevTick) * (origBpm / currentBpm)) * tickLength;
Time::waitForMillisecondCounter(now + delta);
midiPort->sendMessageNow(message);
i++;
prevTick = eventTick;
prevDelta = delta;
}
delete midiPort;
return;
}
